Rare earth element resources on Fuerteventura, Canary Islands, Spain: a geochemical and mineralogical approach

IF 3.2 2区 地球科学 Q1 GEOCHEMISTRY & GEOPHYSICS
Marc Campeny, Inmaculada Menéndez, Luis Quevedo, Jorge Yepes, Ramón Casillas, Agustina Ahijado, Jorge Méndez-Ramos, José Mangas
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Abstract

Abstract. Rare earth elements (REEs) play a pivotal role in the ongoing energy and mobility transition challenges. Given their critical importance, governments worldwide and especially from the European Union, are actively promoting the exploration of REE resources. In this context, alkaline magmatic rocks (including trachytes, phonolites, syenites, melteigites and ijolites), carbonatites and their associated weathering products were subjected to a preliminary evaluation as potential targets for REE exploration on Fuerteventura Island (Canary Archipelago, Spain) based on mineralogical and geochemical studies. These lithologies show significant REE concentrations. However, only carbonatites exhibit the potential to host economically viable REE mineral deposits. REE concentrations in carbonatites of up to 10,301.83 ppm REY (REEs plus yttrium) have been detected, comparable to other locations hosting significant deposits of these critical elements worldwide. Conversely, alkaline magmatic rocks and the resulting weathering products display limited REE enrichment. Notably, REEs in carbonatites are associated with primary accessory phases such as REE-bearing pyrochlore and britholite, and secondary monazite. The carbonatites of Fuerteventura hold promise as prospective REE deposits within a non-conventional geological setting (oceanic island). However, due to intricate structural attributes and possible land use constraints, additional future detailed investigations are imperative to ascertain their genuine economic viability as substantial REE resources.
西班牙加那利群岛富埃特文图拉岛的稀土元素资源:地球化学和矿物学方法
摘要。稀土元素(REEs)在当前的能源和交通转型挑战中发挥着举足轻重的作用。鉴于稀土元素的极端重要性,世界各国政府,尤其是欧盟,都在积极推动稀土元素资源的勘探工作。在此背景下,根据矿物学和地球化学研究,我们对碱性岩浆岩(包括闪长岩、声云母、正长岩、熔长岩和迭长岩)、碳酸盐岩及其相关风化产物进行了初步评估,将其作为富埃特文图拉岛(西班牙加那利群岛)REE 勘探的潜在目标。这些岩性显示出大量的 REE 浓度。然而,只有碳酸盐岩才具有孕育经济上可行的 REE 矿床的潜力。在碳酸盐岩中检测到的 REE 含量高达 10,301.83 ppm REY(REEs 加钇),与世界上蕴藏这些重要元素的其他地方相当。相反,碱性岩浆岩及其风化产物的 REE 富集程度有限。值得注意的是,碳酸盐岩中的 REE 与原生附属相(如含 REE 的辉绿岩和闪长岩)和次生独居石有关。富埃特文图拉的碳酸盐岩有望成为非常规地质环境(海洋岛屿)中的潜在 REE 矿床。然而,由于复杂的结构属性和可能的土地使用限制,未来必须进行更多详细调查,以确定其作为大量 REE 资源的真正经济可行性。
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来源期刊
Solid Earth
Solid Earth GEOCHEMISTRY & GEOPHYSICS-
CiteScore
6.90
自引率
8.80%
发文量
78
审稿时长
4.5 months
期刊介绍: Solid Earth (SE) is a not-for-profit journal that publishes multidisciplinary research on the composition, structure, dynamics of the Earth from the surface to the deep interior at all spatial and temporal scales. The journal invites contributions encompassing observational, experimental, and theoretical investigations in the form of short communications, research articles, method articles, review articles, and discussion and commentaries on all aspects of the solid Earth (for details see manuscript types). Being interdisciplinary in scope, SE covers the following disciplines: geochemistry, mineralogy, petrology, volcanology; geodesy and gravity; geodynamics: numerical and analogue modeling of geoprocesses; geoelectrics and electromagnetics; geomagnetism; geomorphology, morphotectonics, and paleoseismology; rock physics; seismics and seismology; critical zone science (Earth''s permeable near-surface layer); stratigraphy, sedimentology, and palaeontology; rock deformation, structural geology, and tectonics.
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